1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2008, Gary Cook
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief Pickup a ringing channel
*
* \author Gary Cook
*
* \ingroup applications
*/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "asterisk/file.h"
#include "asterisk/logger.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/lock.h"
#include "asterisk/app.h"
#include "asterisk/options.h"
static const char *app = "PickupChan";
static const char *synopsis = "Pickup a ringing channel";
static const char *descrip =
" PickupChan(channel[&channel...]): This application can pickup any ringing channel\n";
/*! \todo This application should return a result code, like PICKUPRESULT */
/*! \brief Helper function that determines whether a channel is capable of being picked up */
static int can_pickup(struct ast_channel *chan)
{
ast_debug(3, "Checking Pickup '%s' state '%s ( %d )'\n", chan->name, ast_state2str(chan->_state), chan->_state);
if (!chan->pbx && (chan->_state == AST_STATE_RINGING || chan->_state == AST_STATE_RING)) {
return 1;
} else {
return 0;
}
}
/*! \brief Helper Function to walk through ALL channels checking NAME and STATE */
static struct ast_channel *my_ast_get_channel_by_name_locked(char *channame)
{
struct ast_channel *chan;
char *chkchan = alloca(strlen(channame) + 2);
/* need to append a '-' for the comparison so we check full channel name,
* i.e SIP/hgc- , use a temporary variable so original stays the same for
* debugging.
*/
strcpy(chkchan, channame);
strcat(chkchan, "-");
for (chan = ast_walk_channel_by_name_prefix_locked(NULL, channame, strlen(channame));
chan;
chan = ast_walk_channel_by_name_prefix_locked(chan, channame, strlen(channame))) {
if (!strncasecmp(chan->name, chkchan, strlen(chkchan)) && can_pickup(chan))
return chan;
ast_channel_unlock(chan);
}
return NULL;
}
/*! \brief Perform actual pickup between two channels */
static int pickup_do(struct ast_channel *chan, struct ast_channel *target)
{
int res = 0;
ast_debug(3, "Call pickup on '%s' by '%s'\n", target->name, chan->name);
if ((res = ast_answer(chan))) {
ast_log(LOG_WARNING, "Unable to answer '%s'\n", chan->name);
return -1;
}
if ((res = ast_queue_control(chan, AST_CONTROL_ANSWER))) {
ast_log(LOG_WARNING, "Unable to queue answer on '%s'\n", chan->name);
return -1;
}
if ((res = ast_channel_masquerade(target, chan))) {
ast_log(LOG_WARNING, "Unable to masquerade '%s' into '%s'\n", chan->name, target->name);
return -1;
}
return res;
}
/*! \brief Attempt to pick up specified channel named , does not use context */
static int pickup_by_channel(struct ast_channel *chan, char *pickup)
{
int res = 0;
struct ast_channel *target;
if (!(target = my_ast_get_channel_by_name_locked(pickup)))
return -1;
/* Just check that we are not picking up the SAME as target */
if (chan->name != target->name && chan != target) {
res = pickup_do(chan, target);
ast_channel_unlock(target);
}
return res;
}
/*! \brief Main application entry point */
static int pickupchan_exec(struct ast_channel *chan, void *data)
{
int res = 0;
struct ast_module_user *u = NULL;
char *tmp = ast_strdupa(data);
char *pickup = NULL, *context = NULL;
if (ast_strlen_zero(data)) {
ast_log(LOG_WARNING, "Pickup requires an argument (channel)!\n");
return -1;
}
u = ast_module_user_add(chan);
/* Parse channel (and ignore context if there) */
while (!ast_strlen_zero(tmp) && (pickup = strsep(&tmp, "&"))) {
if ((context = strchr(pickup , '@'))) {
*context++ = '\0';
}
if (!strncasecmp(chan->name, pickup , strlen(pickup))) {
ast_log(LOG_NOTICE, "Cannot pickup your own channel %s.\n", pickup);
} else {
if (!pickup_by_channel(chan, pickup)) {
break;
}
ast_log(LOG_NOTICE, "No target channel found for %s.\n", pickup);
}
}
ast_module_user_remove(u);
return res;
}
static int unload_module(void)
{
return ast_unregister_application(app);
}
static int load_module(void)
{
return ast_register_application(app, pickupchan_exec, synopsis, descrip);
}
AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Channel Pickup Application");
|
